package com.itheima.sh.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import java.util.List;
import java.util.Map;

@RestController
@RequestMapping("consumer")
public class ConsumerController {

    @Autowired
    private RestTemplate restTemplate;

    @Autowired
    DiscoveryClient discoveryClient;

    @GetMapping("{id}")
    public Map findUser(@PathVariable("id") String username){

        //解决方案1：discoveryClient
       /* List<ServiceInstance> instances = discoveryClient.getInstances("user-service");  // 大小写都可以
        ServiceInstance serviceInstance = instances.get(0);

        String host = serviceInstance.getHost();  // 获取主机地址
        int port = serviceInstance.getPort();     // 获取端口
        String url = serviceInstance.getUri().toString(); // 获取请求URL*/

        // String url = "http://localhost:8081/user/" + id;


        //解决方案2：Ribbon解决负载均衡 默认的负载均衡算法，轮询
        String url = "http://user-service/user/" + username;
        // 调用RestTemplate的getForObject方法，指定url地址和返回值类型
        Map map = restTemplate.getForObject(url, Map.class);
        return map;
    }
}